Intake-manifold heater



The specific ob] 'PatentedV74 Jan. l1, 1.927.

"UNITED l ,srivres PATENT OFFICE.

GEORGE M. HoLLEY, or DETROIT, MICHIGAN.

INTAKE-MANIFOLD HEATER.

Application led December 7, 1823. Serial No. 679.110.

This invention relates to an improvement in an exhaust manifold ot thetype in which gases may be returned to the main exhaust pipe, afterhaving delivered its heat in the intake manifold, instead of escaping tothe, atmosphere where its presence is objectionable for many reasons.

lFigure 1 shows a partial cross sectional elevation on plane 1 -l ofFigure- 2 of the application of the invention to a tour cylinder engineof a well known type.

Figure 2 shows a sectional ecvation on plane 2-2'of Figure 1.

The exhaust manifold, which comprises the compartments yA and N, hasfour exhaust entrancesl B, C, D, and E. The two center exhaustentrances, C and D, discharge into the compartment N, which compartmentis connected'to the compartment'. A through a restricted annular openingF. Through this opening passes a tube G. From the compartment N theredepends a closed tube H into which the tube G extends. The tube Gextends into the compartment A of the ex'- -haust manifold so as toconnect with the cored passage J. This cored passage is arranged so asto deliver the exhaust gases into the outlet of the exhaust manifold.

The intake manifold K "completely surrounds the heating element IL .Thismani-v fold K is provided with an inlet flange L to which' is bolted ahorizontal fearbur'eter M ot a well known type, and is also, providedwith a projecting sleeve O which tits into a correspending opening inthe compartment N oi the exhaust manifold. The chamber is separated fromthe main body of the exhaust manifold A by a diaphragm l.

pe1'ation,.-n operation the exhaust is' discharged from l, from C. fromE, and trom l) successively.` When. the exhaust I:rases are dischargedtrom C or from l). owing to the restriction at F. a portion ot' theexhaust from these two cylinders is 4diverted and flows down H. partingwith itsl heat to the fuel-mixture drawn in through the iii- The cooledexhaust 1s take manifold K. drawn up G, into d, and ont ot' the exhaustmanifold.

' To a certain extent the exhaust gases Howiug down H and up G are underthe influence of the eject-or action o't' the exhaust gases from C, l).and E flowing through A past the outlet from the cored passage J. Theejector action, combined with the annular obstruction at F, determineswhat percentage ot'l exhaust gases escaping at- C and. D are diverteddown H through G, and out il. AA percentage of from 10% to 30% desired,depending on the fuel used. y

The exhaust gases flowing out of the. ports B, C, D, and Earenecessarily intermittent.-

thus giving a pulsating How. The eti'ect of this pulsating flow willcause quite a low pressure to exist at B at a time when there is aconsiderable pressure in N due tothe.

fact that either C or D is supplying exhaust gases to N. This willproduce quite a considerable flow of exhaust gases down H and up G.Furthermore, being a pulsating tiow and not a steady How, the tendencytor water to condense and'collect inthe lower portion ot H will beconnteraeted.

W'hat. I claim is: I

A vaporizer adapted for a multicylinder internal combustionengine,comprising an inlet manifold, an exhaust manifold. a diaphragm 'ithinsaid exhaust manifold havingl a restricted opening therein through whichone ot the exhaust inlets communi- Cates with the main body of theexhaust manifold, an elongated chamber` connected with said exhaustmanifold adjacent to said exhaust inlet, said chamber being in heatconducting relationship with said manifold, a passage connected to theendof said etoilgated chambeil with thf.` outlet from said manifold, wlnAeby the ejector action ot the exhaust flowing out ofthe exhaust.manifold causes a circulation of exhaust gases through said elongatedchamber.

In testimony whereof l atiix my signature.

' GEORGE M. HOLLEY.

